Elevator



(No Model.)

I' No. 371x2854 V. GLINEAU.

BLBvATo;

Patented Nov. 15, 1887.

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`VITAL"GLINEAU, OF LWELL, MASSACHUSETTS.

eLEvAToa.

SPECIFICATION forming part of Letters PatentNo. 373,285, dated Novemberl5, 1887.

Application led April 28, 1887.

T all whom it may concern: i

Be it known that LVITAL GLINEAU, a citizen of the United States,residing at Lowell, in the county of Middlesex and Commonwealth ofMassachusetts, have invented a certain new and useful Improvement inElevators, of which the following is a specication.

My 'invention relates to elevators; aud it consists in the meanshereinafter described of preventing the elevator-car from falling whenthe lifting-r0pe is broken.

In the accompanying drawings, Figure l is an isometric view of anelevator-car provided with my improvement, showing one of theguide-standards, a part of two of the rackstandards, and two of thedogs; Fig. 2, a vertical central section of the floor and floorframingof the car, of the upright at the left, and of parts of theguidestandards and of parts ofthe rack-,standards at the farther side ofthe car, the cross-bar and one of the up# rights being in elevation, andthe dogs being represented as in engagement with the racks of therack-standards3 Fig. 3, a side elevation of the car and vertical centralsections of the guide-standards and of two ofthe rack-standards, thedogs being held out of engagement with the racks; Fig. 4, a sideelevation of one of the tubes which contain the dogs and springs and avertical section of the bars which connect the dogs in pairs; Fig. 5, aplan of the dogs, the bars which connect them, the springs which'operate them, and a horizontal central section of the tubes whichcontain the dogs and springs, and a plan of the lower part of the doublebell-crank lever' and the connect- Aing-rods which connect the lowerarms of said lever to the connecting-bars of the dogs.

The car A, having the rectangular platform a, uprights a,`and cross-bara2, connecting the upper ends of said upright's, is ofany ordinaryconstruction, the car being guided by `vertical guide-standards B,arranged one at serial N. 236,403. (No moan.)

D D', carried in the'platform of the car, the rack-standards serving,with the dogs, to guide the lower part of the car and to confine the carto a vertical path.

The dogs D D are connected in pairs by bars d d', as shown in Fig. 5,thedogs sliding in tubes secured in the platform a of the car below thefloor ofthe saine, the tubes being slotted at e c to allow of themovement of the bars d d. Between each dog and a dog ofthe other pair isarranged a spiral spring, F, within one ofthe tubes E, these springsnormally throwing the dogs outward and into engagement with vertica-lracks c', said racks being arranged one in each groove c. The teethofthe racks c' are sli-ghtly hooking upward, as shown, and the outer endsofthe dogs D D are bent outward and downward and outwardly beveledupward, as shown at di d3 in Fig. 4, so that when the outer ends orpoints of the dogs are partially engaged with the racks c the weight ofthe car and the shape of the rack-teeth and dogs would draw the dogsstill farther outward and prevent the descent of the car. In a verticalgroove, a", iu the inner side of one of the uprights ct', below thefloor of the platform, is journaled at g the double bell-crank lever G,said lever beingprovided at itslower end with two arms, g g2, the freeends of which are respectively above and below the fulcrum of saidlever, as shown in Fig. 2, so that when the lever is turned upon itsfulcrurn the inner ends of the arms g' g2 will be moved, the one nearerto and the other farther from the center of the car. The upper arm, g',is connected by a rod, H, to the bar d of the dogs D, and the free endof the lower arm, g2, is connected by the rod H to the bar d', whichunites the dogs D', so that moving the upper end of the long arm g3 ofthe bell-crank lever G inward will draw the dogs D D into the tubes Eand out of engagement with the racks c', but not entirely out of thegrooves c.

To a bracket, a5, secured to the under side of the cross-bar a2, ispivoted a bell-crank lever, l, the lower arm of which, z', is connectedby a linlgz, to the upper end ofthe arm g3.of the lever G, and the other'end of which lever I is connected by a loop, i3, to a hook, J, securedto the lower end of the lifting-rope (not shown) in the usual manner,the link i surrounding the cross-bar a2, and having an in- IOC- teriorwidth just sufficient to allow it to move freely up and down on saidcross-bar.

It is evident that when the lifting-rope is taut and unbroken the innerend of the lever I will be drawn up against the under side of thecross-bar a by the weight of the car; but when the lifting-rope isbroken orsuddeuly slackened the springs F will throw the dogs and thebars d d outward and cause the upper end of the lever G to swing outwardand draw the inner end of the lever I out of contact with the cross-bara into the position shown in Fig. 2.

Vhen the ear is supported by the liftingrope, the dogs do not interferewith the descent of the ear, being held out ot' engagement, as abovedescribed; but the moment the rope breaks the dogs engage the racks andprevent the car from falling with a crash.

I claim as my invention--` l. Thecoinbination of thecar provided with aplatform, the rack-stamlards provided with racks, dogs sliding in saidplatform and connected in pairs, springs arranged between said pairs ofdogs and thrusting the same outward, a lever pivoted on said car andprovided wit-h two arms, the free ends of which are, respectively, aboveand below the fulcrum of said lever, rods connecting said arms with saidpairs of dogs, respectively, said lever being provided with a third armadapted to be connected to the lifting-rope of said car to draw and holdsaid dogs out of engagement with said racks when said rope is unbrokenand to allow said dogs to engage said racks when said rope is broken, asand for the purpose specified.

2. The combination of the car provided with a platform, therack-standards provided with vertical grooves and with racks arranged inthe deepest parts of said grooves, dogs sliding in said platform andconnected in pairs and normally projecting into said grooves, springsarranged between said pairs of dogs and thrusting the same outward, alever pivoted on said car and provided with two arms, the free ends ofwhich are, respectively, above and below the fulcrum of said lever, rodsconnecting said arms with said pairs of dogs, respectively, said leverbeing provided with a third arm adapted to be connected to thelifting-rope of said ear to guide said car, to draw and hold said dogsout of engagement with said racks when said lifting-rope is unbroken,and to allow said dogs to engage said racks when said rope is broken, asand for the purpose specitied.

3. The combination of the car provided with a platform, therack-standards provided with racks, parallel tubes secured in saidplatform and provided with lateral slots, dogs sliding in said tubes,bars. connecting said dogs in pairs through said slots, springs arrangedin said tubes, a spring between each dog and a dog of the other pair andthrusting said dogs outward, a lever pivoted on said car and providedwith two arms, the free ends of which are, respectively, above and belowthe fulcrum of said lever, rods connecting said arms with the respectivebars which connect said dogs in pairs, said lever being provided with athird arm adapted to bc connected to the liftingrope of said car, as andfor the purpose specified.

In witness whereof I have hereunto set my hand, in presence oftwosubscribing witnesses, this 20th day of April, A. D. 1887.

virAL GLtNEAU.

Vitnesses:

ALBERT M. MOORE, Jol-IN WYMAN.

